package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.RequestBody;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对

        password=DigestUtils.md5DigestAsHex(password.getBytes());
        System.out.println(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新建员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();

        //设置employee属性,把前面emoplyDOT属性拷贝给employee
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置帐号状态，默认正常状态，1正常，0异常
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，默认123456，并md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建时间与修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人与修改id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     *分页查询员工
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult find(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page=employeeMapper.find(employeePageQueryDTO);
        long tatal=page.getTotal();
        List<Employee> records=page.getResult();
        return new PageResult(tatal,records);
    }

    /**
     * 启用或禁用账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee emp=Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(emp);
    }

    /**
     * 通过id查询信息回显
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更改员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmp(@RequestBody EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     * @return
     */
    @Override
    public int updatePassword(PasswordEditDTO passwordEditDTO) {
        //TODO 屎山代码后期优化
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        //获取密码
        String password=employeeMapper.findPasswordById(passwordEditDTO);
        String oldPassword=DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        //判断是否与原密码相等
        if (oldPassword.equals(password)) {
            //改密码
            String newPassword=passwordEditDTO.getNewPassword();
            newPassword=DigestUtils.md5DigestAsHex(newPassword.getBytes());
            passwordEditDTO.setNewPassword(newPassword);
            employeeMapper.updatePassword(passwordEditDTO);
        }else{
            return 0;
        }
        return 1;
    }

}
